One-Shot: Chasing Adventure: Vault of the Molten City

No one else believed it existed, yet here it stands - the legendary Molten City. Hidden in the crater of an enormous volcano, the city's remains still glitter despite centuries of exposure to sulfur and ash. Deep within it lies the Vault of Crowns - said to contain an ancient treasure guarded by an eternal sentinel. You have the key to this vault, whose treasure is both proof of your discovery and the last and greatest relic of its people. But the volcano around you begins to rumble and groan. Time is running out.